import inspect
import math
def test(x, y, z):
     argspec = inspect.getfullargspec(test)
     num = len(argspec.args)
     p = x * math.pow(1.05, num)
     num = num + 1
     p += y * math.pow(1.05, num)
     num = num - 1
     p += z * math.pow(1.05, num)
     return p